JPS59222018A - Soil for cable - Google Patents
Soil for cableInfo
- Publication number
- JPS59222018A JPS59222018A JP58097400A JP9740083A JPS59222018A JP S59222018 A JPS59222018 A JP S59222018A JP 58097400 A JP58097400 A JP 58097400A JP 9740083 A JP9740083 A JP 9740083A JP S59222018 A JPS59222018 A JP S59222018A
- Authority
- JP
- Japan
- Prior art keywords
- cable
- soil
- thermal resistance
- water
- impermeable film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims description 18
- 238000000034 method Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000001556 precipitation Methods 0.000 description 6
- 230000008020 evaporation Effects 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 239000012466 permeate Substances 0.000 description 2
- 108091006503 SLC26A1 Proteins 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（発明の技術分野）
不発明は特に、乾燥地域におけるグープルの土壌熱抵抗
の改善方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION The invention relates in particular to a method for improving soil thermal resistance of gooples in arid regions.
（発明の技術的背景とその問題点）
土壌の熱抵抗は含有水分量によって大きく変化する。従
って、直埋布設ケーブルの土壌の熱抵抗を小さくするた
めには散水等の方法によって水分含有量を多くすればよ
い。(Technical background of the invention and its problems) The thermal resistance of soil varies greatly depending on the moisture content. Therefore, in order to reduce the thermal resistance of the soil of a directly buried cable, it is sufficient to increase the water content by a method such as water sprinkling.
ところが、中近東などの乾燥地帯では水自体が貴重な存
在であるため 散水という方法はとれない。However, in arid regions such as the Middle East, water itself is a precious commodity, so sprinkling water is not an option.
（発明の目的）
本発明は、このような点に着目してなされたもので、直
埋布設ケーブルの土壌熱抵抗を少なくしてケーブルの許
容電流を増大しうるケーブルの土壌熱抵抗の改善方法を
提供せんとするものである。(Object of the Invention) The present invention has been made with attention to the above points, and provides a method for improving the soil thermal resistance of a cable that can reduce the soil thermal resistance of a directly buried cable and increase the allowable current of the cable. We aim to provide the following.
（発明の概を）
本発明においては、直埋布設されたケーブルの上方に不
透水性フィルムな敷設することにより前記目的を達成し
ている。(Summary of the Invention) In the present invention, the above object is achieved by laying an impermeable film above the directly buried cable.
（発明の実施例） 以下、不発明を一実施例の図面に基づいて説明する。(Example of the invention) Hereinafter, the invention will be explained based on the drawings of one embodiment.
第１図において、砂漠地帯等の乾燥地域の土壌１中には
電カケープル２が例えば３条面埋布設されでおり、この
上方にはプラスチックフィルム等より成る不透水性フィ
ルム３が敷設されている。In Fig. 1, for example, three lines of electric power cables 2 are buried in soil 1 in an arid region such as a desert area, and an impermeable film 3 made of a plastic film or the like is laid above the cables. .
不透水性フィルム３を電カケープル２上方に敷設する理
由は次の通りである。すなわち、中近東等の乾燥地帯に
おいては、降水−ｈ（は少ないが地表からの蒸発量はか
なり多い。The reason why the water-impermeable film 3 is placed above the power cable 2 is as follows. In other words, in arid regions such as the Middle East, precipitation - h (-h) is small, but the amount of evaporation from the ground is quite large.
ちなみにかかる地域における年間の蒸発すと降水量の差
は約１００〜２０ Ｏｆ’ ７ｃｍ２にも及ぶことが知
られている。Incidentally, it is known that the annual difference in the amount of evaporation and precipitation in such areas is as much as about 100 to 20 Of'7 cm2.
従って、ケーブルの上方に不透水性フィルム３を敷設し
ておけば地下から上昇してくる水分の蒸発は点線で示す
ように不透水性フィルム３のところで阻止され、ひいて
はこの近傍における土壌熱抵抗を減少させることが可能
となる。Therefore, if an impermeable film 3 is laid above the cable, the evaporation of moisture rising from underground will be blocked at the impermeable film 3, as shown by the dotted line, and the soil thermal resistance in this vicinity will be reduced. It is possible to reduce the
なお、不透水性フィルム３０両側端１’ｊ：第１図のよ
うに折曲し、折曲された不透水性フィルムの端縁部位置
が電カケープル２の位置よりも下方位置にあるようにす
ればより一層土壌熱抵抗が改善される。Note that both ends 1'j of the water-impermeable film 30 are bent as shown in FIG. This will further improve soil thermal resistance.
第２図は、両側縁を折曲した不透水性フィルム３′の上
部路中央部？凹ませ、この凹み部分４に少なくとも１個
の孔５を形成した場合の実施例金示している。Figure 2 shows the center of the upper passage of the impermeable film 3' with both side edges bent. An embodiment in which the recessed portion 4 is formed with at least one hole 5 is shown.
この′７！施例は、若干の降水がある地域にケーブルを
直埋布設する場合に好適する。すなわち降水があった場
合に〉いては、土壌中を浸透する水は凹み部分４の孔５
から屯カケープル近傍の土壌中を湿らせて地下にもぐる
ことになるので、単に不透水フィルム全敷設し足ものと
比すれは、降水のあつ部分だけ土壌熱抵抗を低減するこ
とが可能となる。This '7! This embodiment is suitable for directly burying cables in areas where there is some precipitation. In other words, when there is precipitation, the water that permeates into the soil flows through the pores 5 of the concave portion 4.
Since it moistens the soil near the tunnel caple and goes underground, it is possible to reduce soil thermal resistance only in areas where precipitation is hot, compared to simply laying an impermeable film over the entire area.
なお、凹み部分に礼金形成するのに代えて第３図に示す
ように２枚の不透水フィルム３ａ、３ｂ會使用し、２枚
の不透水性フィルムの重ね合わせ部６ケ折曲部１位１箇
より低位置にあるようにしてもよい。In addition, instead of forming the key money in the recessed part, as shown in Fig. 3, two water-impermeable films 3a and 3b are used, and the overlapping part of the two water-impermeable films is 6 folded parts 1st. It may be located at a lower position than one.
この実施例においては、点線で示すように降水がテーパ
状とされた不透水性フィルム表面を伝わって重ね会わせ
部６に至り、核部の隙間から水が透過することになる。In this embodiment, as shown by the dotted line, precipitation travels along the tapered water-impermeable film surface and reaches the overlapping portion 6, and water permeates through the gap in the core portion.
ところで、上記の方法により、年間５０ｖ／σ！の水分
全ケーブル布設部に舗保できれば、土壌水分１■が１０
〜２０Ｖｏ１％となり土壌熱抵抗を５０〜１００℃、ｃ
ｍ／Ｗに改善することができる。By the way, with the above method, 50v/σ per year! If all of the moisture in the cable can be maintained, the soil moisture will be reduced to 1.
~20Vo1%, soil thermal resistance 50~100℃, c
m/W.
（発明の効果）
以上説、明したように、不発明においてケーブルの上方
に不透水性フィルムを敷設するという簡単な方法で、土
壌の熱抵抗を減少させ、ひいては直埋布設ケーブルの許
容電流全増大できる利点がある。(Effects of the invention) As explained and clarified above, the simple method of laying an impermeable film above the cable can reduce the thermal resistance of the soil, and in turn, reduce the allowable current of the directly buried cable. There is an advantage that it can be increased.
第１図は不発明の一実施例を示す説明図、第２および第
３図は他の実施例金示す６発明図である。
１・・・・・・・・・・・・・・・・・・・・・土 １
１１！２・・・・・・・・・・・・・・・・・・ＴＩＴ
、カケ−プル３．３′、３ａ１３ｂ・・・・・・・・・
不透水性フィルム第１図
第２図
第３ｒＩ４FIG. 1 is an explanatory drawing showing one embodiment of the invention, and FIGS. 2 and 3 are six invention drawings showing other embodiments. 1・・・・・・・・・・・・・・・・・・Sat 1
11!2・・・・・・・・・・・・・・・TIT
, capeple 3.3', 3a13b...
Water impermeable film Figure 1 Figure 2 Figure 3rI4
Claims (1)
を敷設することを特徴とするケーブルの土壌熱抵抗の改
善方法。 ２、フィルムの両側端が下方に折曲されていることを特
徴とする特許請求の範囲第１項記載のケーブルの土壌熱
抵抗の改善方法。 ３、フィルムの略中央部を凹ませ、この凹み部に少なく
とも１個の孔を形成してなることを特徴とする特許請求
の範囲第１項または第２項記載のケーブルの土壌熱抵抗
の改善方法。[Claims] 1. A method for improving the soil thermal resistance of a cable, which comprises laying an impermeable film above the buried cable. 2. The method for improving soil thermal resistance of a cable according to claim 1, wherein both ends of the film are bent downward. 3. Improving the soil thermal resistance of the cable according to claim 1 or 2, characterized in that the approximately central portion of the film is recessed and at least one hole is formed in the recessed portion. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58097400A JPS59222018A (en) | 1983-06-01 | 1983-06-01 | Soil for cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58097400A JPS59222018A (en) | 1983-06-01 | 1983-06-01 | Soil for cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59222018A true JPS59222018A (en) | 1984-12-13 |
Family
ID=14191463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58097400A Pending JPS59222018A (en) | 1983-06-01 | 1983-06-01 | Soil for cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59222018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100473328B1 (en) * | 2001-10-05 | 2005-03-07 | 한보니스코 주식회사 | Protect plate for subterranean line |
-
1983
- 1983-06-01 JP JP58097400A patent/JPS59222018A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100473328B1 (en) * | 2001-10-05 | 2005-03-07 | 한보니스코 주식회사 | Protect plate for subterranean line |
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